CN106051235B - Fireproof check valve - Google Patents
Fireproof check valve Download PDFInfo
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- CN106051235B CN106051235B CN201610654830.5A CN201610654830A CN106051235B CN 106051235 B CN106051235 B CN 106051235B CN 201610654830 A CN201610654830 A CN 201610654830A CN 106051235 B CN106051235 B CN 106051235B
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- check valve
- valve block
- exhaust port
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/04—Flame traps allowing passage of gas but not of flame or explosion wave in flues or chimneys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Check Valves (AREA)
Abstract
The invention relates to a fireproof check valve, which solves the problems of short service life and poor user experience of the fireproof check valve. The utility model provides a fire prevention check valve, includes body, valve block and coupling mechanism, be equipped with the gas vent on the body, the valve block lid is established on the gas vent, the body with the valve block passes through coupling mechanism connects, fire prevention check valve still includes the mounting and is used for slowing down the valve block striking the flexible member of body effort, mounting one end with the valve block is connected, the extrusion of the mounting other end the flexible member makes this flexible member centre gripping be in the mounting with between the valve block.
Description
Technical Field
The invention relates to a fireproof check valve.
Background
The fireproof check valve comprises a valve body, a valve block, a torsion spring and a connecting rod, wherein the valve body is provided with an air inlet and an air outlet, the valve block is covered on the air outlet, one end of the connecting rod is rotatably connected with the valve body, the other end of the connecting rod is rotatably connected with the valve block, and when the torsion spring drives the connecting rod to rotate relative to the valve body, the valve block can close the air outlet. Because valve block and valve body are made by the metal, consequently, when the air outlet was closed to the valve block, the valve block striking valve body and noise production, this has just caused the fire prevention check valve to have life weak point, user experience is poor.
Disclosure of Invention
The invention aims to provide a fireproof check valve, which improves the user experience of the fireproof check valve and prolongs the service life of the fireproof check valve.
In order to solve the above problems, the present invention provides the following technical solutions:
the utility model provides a fire prevention check valve, includes body, valve block and coupling mechanism, be equipped with the gas vent on the body, the valve block lid is established on the gas vent, the body with the valve block passes through coupling mechanism connects, fire prevention check valve still includes the mounting and is used for slowing down the valve block striking the flexible member of body effort, mounting one end with the valve block is connected, the extrusion of the mounting other end the flexible member makes this flexible member centre gripping be in the mounting with between the valve block.
Furthermore, the fixing piece is abutted to the body in the process that the valve plate closes the exhaust port.
Further, the flexible piece comprises a connecting portion and a sealing portion, the connecting portion is used for being connected with the valve plate, the sealing portion is connected to the side, facing the body, of the connecting portion, the valve plate covers the exhaust port, and the sealing portion and/or the connecting portion are attached to the body to seal a gap between the valve plate and the body.
Further, in the axial direction of the valve plate, the thickness dimension of the sealing portion is smaller than that of the connecting portion.
Furthermore, a groove is formed in the connecting portion, and the valve plate is inserted into the groove.
Further, connecting portion are end to end's annular rubber circle, sealing part be by the annular sealing piece that annular rubber circle outwards extends.
Further, an included angle between the annular rubber ring and the annular sealing sheet is smaller than 60 degrees.
Furthermore, the fixed part is a spring piece, and the spring piece is abutted against the joint of the connecting part and the sealing part, or the spring piece is abutted against the connecting part.
Furthermore, the fixing piece is connected with the valve plate through a screw.
The utility model provides a fire prevention check valve, includes body, valve block and coupling mechanism, be equipped with the gas vent on the body, the valve block lid is established on the gas vent, the body with the valve block passes through coupling mechanism connects, fire prevention check valve still includes the mounting and is used for slowing down the valve block striking the flexible member of body effort, mounting one end with this body coupling, the extrusion of the mounting other end the flexible member makes this flexible member centre gripping be in the mounting with between the body.
The invention has the beneficial effects that:
1. the fireproof check valve comprises the flexible piece, the flexible piece is used for slowing down the acting force of the valve plate impacting the body, and when the acting force of the valve plate impacting the body is reduced, noise generated when the valve plate closes the exhaust port is greatly reduced. So design, the noise that the fire prevention check valve sent through reducing its working process to realize improving user experience.
2. Because the flexible piece is used for slowing down the effort that the valve block strikeed the body, consequently, when the effort that the valve block strikeed the body diminishes, the life of valve block also can corresponding increase. The valve block of fire prevention check valve belongs to the loss piece, and when the life of valve block increased, the life of fire prevention check valve can corresponding increase.
3. The fireproof check valve further comprises a fixing piece, one end of the fixing piece is connected with the valve plate, the other end of the fixing piece extrudes the flexible piece, the flexible piece is clamped between the fixing piece and the valve plate under the extrusion of the fixing piece, and when the flexible piece is clamped between the fixing piece and the valve plate, the position of the flexible piece relative to the valve plate is not prone to change, so that the sealing performance of the fireproof check valve is guaranteed. So design, the life of fire prevention check valve can increase correspondingly.
4. The fixing piece can be abutted against the body in the process that the valve plate closes the exhaust port, so that at least part of the fixing piece corresponds to the side wall of the body, which is adjacent to the exhaust port, and the contact area between the flexible piece and the body is reduced; the in-process of gas vent is opened to the valve block, the frictional force that produces between flexible and the body will diminish, and when the frictional force that the flexible received in the course of the work diminished, the life of flexible will be increased. Since the flexible member is a sacrificial member, the service life of the fire check valve may be increased as the service life of the flexible member is increased.
5. The fireproof check valve further comprises a fixing piece, one end of the fixing piece is connected with the body, the other end of the fixing piece extrudes the flexible piece, the flexible piece is clamped between the fixing piece and the body under the extrusion of the fixing piece, and when the flexible piece is clamped between the fixing piece and the body, the position of the flexible piece relative to the body is not easy to change, so that the sealing performance of the fireproof check valve is ensured. So design, the life of fire prevention check valve can increase correspondingly.
Drawings
FIG. 1 is a cross-sectional view of a valve plate according to a preferred embodiment of the present invention;
FIG. 2 is a partial front view of a fire check valve in accordance with a preferred embodiment of the present invention;
fig. 3 is a side view of the attachment mechanism in the preferred embodiment of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Example one
Referring to fig. 1 and 2, a fireproof check valve comprises a body, a valve plate 1 and a connecting mechanism, wherein an exhaust port is formed in the body, the valve plate 1 covers the exhaust port, and the body is connected with the valve plate 1 through the connecting mechanism.
Referring to fig. 1 and 2, the body of the present embodiment includes a valve body and a valve seat 7 fixed on the valve body, the valve body is provided with an air guide channel, the air guide channel is provided with an air inlet and an air outlet, the air outlet is an air outlet, the valve sheet 1 covers the air outlet, and the valve seat 7 is connected with a side wall of the air guide channel adjacent to the air outlet; the body of this embodiment further includes a rotating shaft 61, the connecting mechanism is rotatably connected to the valve seat 7 through the rotating shaft 61, and the elastic element 5 drives the connecting mechanism to rotate around the rotating shaft 61, so as to maintain the tendency of the valve sheet 1 to close the air outlet. In other embodiments of the present invention, the exhaust port is an air inlet, the valve plate is covered at the air inlet, the valve seat is connected with the side wall of the air guiding channel adjacent to the air inlet by welding, or the valve seat is connected with the side wall of the air guiding channel adjacent to the air inlet by a stud; in addition, in other embodiments of the present invention, the body includes a valve body and a rotating shaft, and the connecting mechanism is connected with the valve body through the rotating shaft.
Referring to fig. 1, 2 and 3, the connecting mechanism of the present embodiment includes a connecting rod 3 and a shaft sleeve 4 fixed on the connecting rod 3, the connecting rod 3 is connected with the valve plate 1, the shaft sleeve 4 is provided with a first threaded hole 41, the axial length of the first threaded hole 41 is H1, the thickness of the connecting rod 1 is H2, and H1 > H2. When the rotating shaft 61 penetrates the first threaded hole 41, the rotating shaft 61 is threadedly coupled to the bushing 4. In other embodiments of the present invention, the connecting mechanism comprises a connecting rod, the connecting rod is in threaded connection with the rotating shaft; or the outer contour of the connecting rod is circular, the rotating shaft is provided with a through hole, and the connecting rod penetrates through the through hole.
Referring to fig. 1, the difference from the prior art is that: the fire prevention check valve of this embodiment still includes mounting 10 and the flexible piece 2 that is used for slowing down 1 striking body efforts of valve block, and mounting 10 one end is connected with valve block 1, and mounting 10 other end extrusion flexible piece 2 makes the 2 centre gripping of this flexible piece between mounting 10 and valve block 1, and is specific: the flexible piece 2 is used for slowing down the acting force that valve block 1 strikeed the valve body, and when the gas vent was closed to valve block 1, valve block 1 passed through the valve body of flexible piece 2 laminating to realize that valve block 1 closes the gas vent. In other embodiments of the invention, the body comprises a valve seat and an annular plate provided with the exhaust port, the annular plate is connected with the valve seat and is in a flat plate shape, and when the valve plate closes the exhaust port, the valve plate is attached to the annular plate through the flexible piece so as to close the exhaust port.
Referring to fig. 1, the fixing member 10 of this embodiment abuts against the body in the process of closing the exhaust port by the valve sheet 1, specifically: when the valve plate 1 closes the exhaust port, the fixing member 10 collides with the valve body, and when the valve plate 1 closes the exhaust port through the flexible member 2, a certain gap is formed between the fixing member 10 and the valve body. Because the flexible member 2 is clamped between the fixed member 10 and the valve plate 1, whether the fixed member 10 collides with the valve body in the process of closing the exhaust port by the valve plate 1 depends on the extrusion force applied to the flexible member 2. In other embodiments of the invention, the fixing piece does not collide with the valve body in the process of closing the exhaust port by the valve plate, and when the valve plate closes the exhaust port by the flexible piece, a certain gap is arranged between the fixing piece and the valve body; or, in the process that the valve plate closes the exhaust port, the fixing piece collides with the valve body, and when the valve plate closes the exhaust port through the flexible piece, the fixing piece abuts against the valve body.
Referring to fig. 1, the flexible member 2 of this embodiment includes connecting portion 21 and sealing portion 22 for connecting valve sheet 1, and sealing portion 22 connects in the one side that connecting portion 21 faces the body, and when valve sheet 1 lid was established on the gas vent, sealing portion 22 and/or connecting portion 21 laminated the body in order to close the clearance between valve sheet 1 and the body, specifically: when the valve plate 1 covers the exhaust port, the sealing part 22 is attached to the valve body to seal the gap between the valve plate 1 and the valve body; or, when the valve plate 1 covers the exhaust port, the sealing part 22 and the connecting part 21 are attached to the valve body to close the gap between the valve plate 1 and the valve body; alternatively, when the valve sheet 1 covers the exhaust port, the connecting portion 21 is attached to the valve body to close the gap between the valve sheet 1 and the valve body.
Preferably, the thickness dimension of the sealing portion 22 is smaller than the thickness dimension of the connecting portion 21 in the axial direction of the valve sheet 1. When the thickness of the seal portion 22 is small, the difficulty of attaching the seal portion 22 to the valve body is reduced. Of course, in other embodiments of the present invention, the thickness dimension of the sealing portion may be greater than or equal to the thickness dimension of the connecting portion.
Referring to fig. 1, the connection portion 21 of this embodiment is provided with a groove 211, and the valve sheet 1 is inserted into the groove 211. In other embodiments of the invention, the connecting portion is affixed to the valve plate; or the connecting part is fixed on the valve plate through rivets.
Referring to fig. 1, the connecting portion 21 of the present embodiment is an annular rubber ring connected end to end, the groove 211 is an annular groove provided inside the annular rubber ring, and the sealing portion 22 is an annular sealing piece extending outward from the annular rubber ring and made of rubber. In other embodiments of the present invention, the annular sealing ring and the annular sealing piece are integrated by glue. Of course, in other embodiments of the present invention, the connecting portion is an annular plastic ring formed by splicing a plurality of arc-shaped plastic segments, and the sealing portion is an annular sealing sheet extending outwards from the annular plastic ring, and the annular sealing sheet is made of refractory cotton.
Preferably, the included angle between the annular rubber ring and the annular sealing sheet is alpha, and alpha is less than 60 degrees. So design, when unevenness's the condition appeared in the lateral wall of the adjacent gas vent of valve body, and alpha < 60 when, annular rubber circle extrusion annular gasket makes annular gasket laminating valve body to realize that valve block 1 closes the gas vent.
Referring to fig. 1, the fixing member 10 of the present embodiment is a spring piece, and the spring piece abuts against the connecting portion 21. In other embodiments of the invention, the spring plate abuts against the joint of the connecting part and the sealing part. Of course, in other embodiments of the invention, the fixing member may be made of a fire resistant plastic that is flat.
Preferably, the fixing member 10 is connected to the valve plate 1 by a screw, and the screw is referred to as a first screw for convenience of distinction in this embodiment. In other embodiments of the present invention, the fixing member is connected to the valve plate by a rivet.
Referring to fig. 2, the fireproof check valve further includes a second screw 6, the rotation shaft 61 is a shaft portion of the second screw 6, and the second screw 6 is threadedly coupled to the valve seat 7 to prevent the second screw 6 from being positionally displaced with respect to the valve seat 7. In other embodiments of the present invention, the shaft is a threaded rod that is integrally formed with the valve seat.
Referring to fig. 1 and 3, the connecting rod 3 of the present embodiment is rotatably connected to the valve plate 1, specifically: the fireproof check valve further comprises a third screw 8 and a fourth screw, a second threaded hole 31 is formed in one end, far away from the shaft sleeve 4, of the connecting rod 3, the connecting mechanism further comprises a connecting piece 9, a first avoidance hole is formed in the connecting piece 9, and the third screw 8 penetrates through the first avoidance hole to be connected with the second threaded hole 31 so that the connecting piece 9 is fixed on the connecting rod 3; be equipped with the second on the valve block 1 and dodge hole 11, still be equipped with the third screw hole on the connecting piece 9, the fourth screw passes the second and dodges hole 11 and be connected with the third screw hole to realize that connecting piece 9 fixes on valve block 1. By the design, the movement range of the valve plate 1 relative to the connecting mechanism is increased. In other embodiments of the invention, the connecting rod is rotatably connected to the valve plate, or the connecting rod is fixed to the valve plate.
Referring to fig. 3, preferably, an avoiding groove 32 is further formed at one end of the connecting rod 3, which is far away from the shaft sleeve 4, and when a fourth screw passes through the second avoiding hole 11 and is connected with the third threaded hole, the avoiding groove 32 can avoid the connecting rod 3 from interfering with the fourth screw.
Example two
The utility model provides a fire prevention check valve, includes body, valve block and coupling mechanism, be equipped with the gas vent on the body, the valve block lid is established on the gas vent, the body with the valve block passes through coupling mechanism connects.
The valve body of the embodiment comprises a valve body and a valve seat fixed on the valve body, wherein the valve body is provided with a wind guide channel, the wind guide channel is provided with an air inlet and an air outlet, the air outlet is an air outlet, a valve plate cover is arranged at the air outlet, and the valve seat is connected with the side wall of the wind guide channel, which is adjacent to the air outlet; the body of this embodiment still includes the pivot, and coupling mechanism passes through the pivot with the disk seat and rotates and be connected, and elastic element drive coupling mechanism revolves the pivot and rotates to the trend that the air outlet was closed to the maintenance valve block. In other embodiments of the present invention, the exhaust port is an air inlet, the valve plate is covered at the air inlet, the valve seat is connected with the side wall of the air guiding channel adjacent to the air inlet by welding, or the valve seat is connected with the side wall of the air guiding channel adjacent to the air inlet by a stud; in addition, in other embodiments of the present invention, the body includes a valve body and a rotating shaft, and the connecting mechanism is rotatably connected with the valve body through the rotating shaft.
The connecting mechanism of this embodiment includes the connecting rod and fixes the axle sleeve on the connecting rod, and the connecting rod is connected with the valve block, is equipped with first screw hole on the axle sleeve, and the axial length of first screw hole is H1, and the thickness of connecting rod is H2, and H1 > H2. When the rotating shaft penetrates through the first threaded hole, the rotating shaft is in threaded connection with the shaft sleeve. In other embodiments of the invention, the connection mechanism comprises a connecting rod in threaded connection with the rotating shaft.
The difference with the prior art lies in: the fire prevention check valve of this embodiment still includes the mounting and is used for slowing down the flexible piece that valve block striking body effort, mounting one end and this body coupling, and the mounting other end extrudees the flexible piece and makes this flexible piece centre gripping between mounting and body, and is specific: the flexible piece is used for slowing down the effort of valve block striking valve body, and when the gas vent was closed to the valve block, the valve block passed through flexible piece laminating valve body to realize that the valve block closed the gas vent. In other embodiments of the invention, the body comprises a valve seat and an annular plate provided with the exhaust port, the annular plate is connected with the valve seat and is in a flat plate shape, and when the valve plate closes the exhaust port, the valve plate is attached to the annular plate through the flexible piece so as to close the exhaust port.
The mounting of this embodiment offsets with the valve block at the in-process that the gas vent was closed to the valve block, and is specific: when the valve plate closes the exhaust port through the flexible part, a certain gap is formed between the fixing part and the valve plate. Because the flexible piece centre gripping is between mounting and valve body, consequently, whether the mounting can take place collision each other with the valve block at the in-process that the gas vent was closed to the valve block, depends on the extrusion force that the flexible piece received. In other embodiments of the invention, the fixing piece does not collide with the valve plate when the valve plate closes the exhaust port, and a certain gap is formed between the fixing piece and the valve plate when the valve plate closes the exhaust port through the flexible piece; or, in the process that the valve plate closes the exhaust port, the fixing piece collides with the valve plate, and when the valve plate closes the exhaust port through the flexible piece, the fixing piece abuts against the valve plate.
The flexible member of this embodiment is including connecting portion and the sealing that is used for connecting the body, and the sealing is connected in connecting portion one side towards the valve block, and when the valve block lid was established on the gas vent, the clearance of sealing and/or connecting portion laminating valve block between with closed valve block and body was specific: when the valve plate is covered on the exhaust port, the sealing part is attached to the valve plate to seal a gap between the valve plate and the valve body; or when the valve plate is covered on the exhaust port, the sealing part and the connecting part are attached to the valve plate to seal the gap between the valve plate and the valve body; or when the valve plate covers the exhaust port, the connecting part is attached to the valve plate to close the gap between the valve plate and the valve body.
The connecting portion of this embodiment are end to end's annular rubber circle, and annular rubber circle pastes on the valve body, and the sealing portion is the annular gasket that outwards extends by annular rubber circle, and this annular gasket is made by rubber.
Preferably, the included angle between the annular rubber ring and the annular sealing sheet is alpha, and alpha is less than 60 degrees.
The fixing piece of this embodiment is the spring leaf, and the spring leaf offsets with connecting portion. In other embodiments of the invention, the spring plate abuts against the joint of the connecting part and the sealing part. Of course, in other embodiments of the invention, the fixing member may be made of a fire resistant plastic that is flat.
Preferably, the fixing member is connected with the valve body by a screw, and the screw is referred to as a first screw for convenience of distinction in the embodiment. In other embodiments of the invention, the fixing member is connected to the valve body by a rivet.
The fireproof check valve of this embodiment still includes the second screw, and the pivot is the pole portion of second screw to, second screw and valve seat threaded connection prevent that the second screw from taking place position shift relative to the valve seat. In other embodiments of the present invention, the shaft is a threaded rod that is integrally formed with the valve seat.
The connecting rod of this embodiment is connected with the valve block rotation, and is specific: the fireproof check valve further comprises a third screw and a fourth screw, a second threaded hole is formed in one end, far away from the shaft sleeve, of the connecting rod, the connecting mechanism further comprises a connecting piece, a first avoidance hole is formed in the connecting piece, and the third screw penetrates through the first avoidance hole to be connected with the second threaded hole so that the connecting piece is fixed on the connecting rod; the valve block is provided with a second avoiding hole, the connecting piece is further provided with a third threaded hole, and a fourth screw penetrates through the second avoiding hole to be connected with the third threaded hole so as to realize that the connecting piece is fixed on the valve block. By the design, the movement range of the valve plate relative to the connecting mechanism is increased. In other embodiments of the invention, the connecting rod is rotatably connected to the valve plate.
Preferably, the one end that the axle sleeve was kept away from to the connecting rod still is equipped with and dodges the groove, and when the fourth screw passed the second and dodged the hole and be connected with the third screw hole, dodge the groove and can avoid connecting rod and fourth screw to take place to interfere.
While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (8)
1. A fireproof check valve comprises a body, a valve block and a connecting mechanism, wherein an exhaust port is formed in the body, the valve block is covered on the exhaust port, the body is connected with the valve block through the connecting mechanism, the fireproof check valve is characterized by further comprising a fixing piece and a flexible piece for relieving the action force of the valve block impacting the body, at least part of the fixing piece corresponds to the side wall of the body, which is close to the exhaust port, so that the contact area between the flexible piece and the body is reduced, one end of the fixing piece is connected with the valve block, and the other end of the fixing piece extrudes the flexible piece and enables the flexible piece to be clamped between the fixing piece and the valve block; the fixing piece is abutted against the body in the process that the valve plate closes the exhaust port; the flexible piece comprises a connecting part and a sealing part which are used for connecting the valve plate.
2. The fire prevention check valve of claim 1, wherein the sealing portion is connected to a side of the connecting portion facing the body, and when the valve plate cover is disposed on the exhaust port, the sealing portion and/or the connecting portion is attached to the body to close a gap between the valve plate and the body.
3. The fire prevention check valve of claim 2, wherein a thickness dimension of the sealing portion is smaller than a thickness dimension of the connecting portion in an axial direction of the valve sheet.
4. The fire prevention check valve of claim 2, wherein the connecting portion is provided with a groove into which the valve sheet is inserted.
5. The fire resistant check valve of claim 4 wherein said connecting portion is an annular rubber ring joined end to end and said sealing portion is an annular sealing disc extending outwardly from said annular rubber ring.
6. The fire resistant check valve of claim 5 wherein the angle between said annular rubber ring and said annular sealing disc is less than 60 °.
7. The fire resistant check valve of claim 2, wherein the retaining member is a spring plate that abuts against a junction of the connecting portion and the sealing portion or abuts against the connecting portion.
8. A fire protection check valve according to any of claims 1 to 7, wherein said retainer is screwed to said valve plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610654830.5A CN106051235B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
| CN201910100899.7A CN110425313B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610654830.5A CN106051235B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100899.7A Division CN110425313B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
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| Publication Number | Publication Date |
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| CN106051235A CN106051235A (en) | 2016-10-26 |
| CN106051235B true CN106051235B (en) | 2020-12-22 |
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| CN201610654830.5A Active CN106051235B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
| CN201910100899.7A Active CN110425313B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100899.7A Active CN110425313B (en) | 2016-08-09 | 2016-08-09 | Fireproof check valve |
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| CN202659990U (en) * | 2012-06-11 | 2013-01-09 | 保一集团有限公司 | Adjustable swing check valve |
| CN205026153U (en) * | 2015-10-09 | 2016-02-10 | 杭州小米环境科技有限公司 | Fire -proof check valve |
| CN205908812U (en) * | 2016-08-09 | 2017-01-25 | 杭州小米环境科技有限公司 | Fire -proof check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110425313A (en) | 2019-11-08 |
| CN106051235A (en) | 2016-10-26 |
| CN110425313B (en) | 2021-09-10 |
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